<template>
  <div>
    <ul>
        <li v-for="(item,index) in arr" :key="index">{{item}}</li>
    </ul>
    <button @click="fn">走一走</button>
  </div>
</template>

<script>
export default {
  data(){
    return {
        arr:['帅哥','美女','程序员']
    }
  },
  methods: {
    fn(){
        this.arr.push(this.arr[0])
        this.arr.shift()
    }
  }
}
</script>

<style scoped>

</style>
